Average Weather in October in Oroville East California, United States

In Oroville East, the month of October is characterized by rapidly falling daily high temperatures, with daily highs decreasing by 13°F, from 81°F to 69°F over the course of the month, and rarely exceeding 91°F or dropping below 59°F.

For reference, on July 19, the hottest day of the year, temperatures in Oroville East typically range from 65°F to 93°F, while on December 31, the coldest day of the year, they range from 39°F to 52°F.

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Clouds

The month of October in Oroville East experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 22% to 41%.

The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 78% of the time.

For reference, on February 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 60%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 90%.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Oroville East, the chance of a wet day over the course of October is very rapidly increasing, starting the month at 9% and ending it at 21%.

For reference, the year's highest daily chance of a wet day is 36% on February 28, and its lowest chance is 0% on July 20.

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during October in Oroville East is rapidly increasing, starting the month at 0.9 inches, when it rarely exceeds 2.6 inches, and ending the month at 2.9 inches, when it rarely exceeds 6.0 inches or falls below 0.4 inches.

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of October in Oroville East, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 14 minutes, implying an average daily decrease of 2 minutes, 28 seconds, and weekly decrease of 17 minutes, 13 seconds.

The shortest day of the month is October 31, with 10 hours, 32 minutes of daylight and the longest day is October 1, with 11 hours, 45 minutes of daylight.

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Oroville East is 7:02 AM on October 1 and the latest sunrise is 31 minutes later at 7:33 AM on October 31.

The latest sunset is 6:47 PM on October 1 and the earliest sunset is 43 minutes earlier at 6:05 PM on October 31.

Daylight saving time is observed in Oroville East during 2017, but it neither starts nor ends during October, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:38 AM and sets 14 hours, 58 minutes later, at 8:36 PM, while on December 21, the shortest day of the year, it rises at 7:22 AM and sets 9 hours, 23 minutes later, at 4:45 PM.

The solar day over the course of October. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Oroville East is essentially constant during October, remaining around 0% throughout.

For reference, on July 30, the muggiest day of the year, there are muggy conditions 0% of the time, while on October 11, the least muggy day of the year, there are muggy conditions 0% of the time.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Oroville East is essentially constant during October, remaining within 0.1 miles per hour of 3.1 miles per hour throughout.

For reference, on December 18, the windiest day of the year, the daily average wind speed is 3.6 miles per hour, while on June 5, the calmest day of the year, the daily average wind speed is 3.0 miles per hour.

Wind Direction in October

The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Oroville East is rapidly decreasing during October, falling by 1.8 kWh, from 5.1 kWh to 3.3 kWh, over the course of the month.

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Oroville East are 39.511 deg latitude, -121.475 deg longitude, and 817 ft elevation.

The topography within 2 miles of Oroville East contains very significant variations in elevation, with a maximum elevation change of 1,079 feet and an average elevation above sea level of 777 feet. Within 10 miles contains very significant variations in elevation (3,212 feet). Within 50 miles contains large variations in elevation (8,428 feet).

The area within 2 miles of Oroville East is covered by grassland (41%), shrubs (30%), trees (11%), and artificial surfaces (11%), within 10 miles by grassland (38%) and trees (25%), and within 50 miles by trees (37%) and cropland (29%).

Data Sources

This report illustrates the typical weather in Oroville East year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Oroville East.

The estimated value at Oroville East is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Oroville East and a given station.

Other Data

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.